1. The problem statement, all variables and given/known data See attachment "problem". 2. Relevant equations See attachment "data" 3. The attempt at a solution Can someone tell me what values to plug in for the equation R/M integral (a+bT+cT^2...). The solution doesn't show this step, so I have no idea the numbers they used to get to 516.9 kJ/kg. I know M is the molecular mass (44g), don't know R (universal gas constant, there are several), and as to the a+bT+cT^2+dT^3 from table D11 I plug in the values of a, b, c, and d for CO2, plug in 800K and 300K and do the integral and get something to the 19th power...which obviously is wrong. Any help would be appreciated. Thanks.